The rarest of farts, this anomaly occurs when wearing jeans that are way too tight. Gas is released from the anus but has nowhere to escape, so it travels along the taint to the pocket created by your balls against your leg, then is released to either side of your package. It usually results in a bizarre tickling sensation and sounds like cat meowing backwards.
"What the fuck was that!?"
"What?"
"That noise that just came from your groinal region!?"
"Oh, that. I just dropped a roaming gnome. These pants are two sizes to small."
The "sweet tea roadie" is when you are getting a well-lubed handy from your lady while driving. Right before you erupt your load all over your ride, you reach for the McDonald's large, $.99 sweet tea cup you have yet to throw out... You blow your entire load into the styrofoam cup...easy.